ML20129D308

Submits Station Blackout Modeling in Probalistic Safety Analysis for Proposed Standby Diesel Generator License Amendments,South Texas Project,Units 1 & 2

ML20129D308
Person / Time
Site:	South Texas
Issue date:	09/24/1996
From:	Alexion T NRC
To:	NRC
References
TAC-M92169, TAC-M92170, NUDOCS 9609300035
Download: ML20129D308 (2)

Text

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. September 24, 1996 j l

MEMORANDUM T0: PDIV-I File l FROM: Tom Alexion

SUBJECT:

STATION BLACK 0UT MODELING IN THE PROBABILISTIC SAFETY ANALYSIS FOR PROPOSED STANDBY DIESEL GENERATOR LICENSE l AMENDMENTS, SOUTH TEXAS PROJECT, UNITS 1 AND 2 (STP)

(TAC NOS. M92169 AND M92170)

I received tho attached fax from John Flack, who received it from the licensee.

l Docket No. 50-498 and 50-499 l

Attachment:

Fax from Licensee DISTRIBUTION:

Docket File PUBLIC (PDR)

TAlexion l

D0C. NAME: STP92169 1

)

l l

DE Di ' /

NRC ftE CENTER COPY 3aeeis 9609300035 960924 PDR ADOCK 05000498 P PDR

00/10 '06 13:21 ID STP,HL&P NUCLEAR ENG FAX:072808' PACE 2 o

ISBO_ INT 1.XLWJDG_SBO XLS

... l  !. _. ._.. .... .L _.

. .. . . Station Blockout (880) Contibution 1 i i

l _ >

i initiatore used to calculate 880 j

! LOSP Loss of 345kV Offrite Power LOMT Loss of PoWor ffom Mein Iransformer LOSPX Loss of all Offs!ts Power TLOSP Loss of 34SkV Power 1

) 1

, TLOSPX Loss of 345kV & 138kV, P.o._wer I

Fre.quency of Sequences for:

Base Case SBO 3.73E-06

,Bese Ceee PDS 2.07 E-05

!D21 AOT SBO I 5.28E-OS 1 l

4 i

ID21AOT PDS  ! 2.30E-05 j

ID14RV1 iSBO l 4.40E 06 ' ' " ~"

i I

'fD14RV1 7PDS 2.18E 057 I

- ~ ~

I  ! Percent increasifor SSO Freipiency from Base Ne~e

~

D21 AO.T i .. '41.81} _ _ . .

_.q Percent increase for PDS Frequency from Bose Caos 4

'D21 AOT 10.09 i 'D14RV1 .. 5.28 j

. I

.,880 Percent of Database 4

l '

IBase Case f 18.01 D21 AOT 23.03 i D14RV1 1 20.18 cNes

$1se C a a, ,. -y //faclc l W ' $ e N t e n o*b 0 Q*J 'e

()2 i (\ en rt Nod <l < 9 tes m W o z.s Cay sam & /

b j'j @ \/ l D Nfoht f ft ft+Lc M tv d' l'/ h y .Std m;'k /

Sho -> %L b h,A l Pb 5 -9 C o. < e Dwee Fee -c acm ISBO_ INT 1.XLW)DG_SBO.XLS 9/18/96 ATTACHMENT